package com.glzn.springboot03.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * @author gongjq
 */
public class LoginInterceptor implements HandlerInterceptor {
	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
		HttpSession session = request.getSession();
		System.out.println("请求地址是:"+request.getRemoteAddr());
		//有user就返回true
		if (session.getAttribute("user") != null){
			return true;
		} else {
			//重定向到首页
			request.setAttribute("LOGIN_ERROR","请先登录");
			request.getRequestDispatcher("/").forward(request, response);
			return false;
		}
	}

	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

	}

	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

	}
}
